Eight pages. According to the query "ppt template for graduation thesis defense of medical imaging specialty", it takes 8 pages to display the defense of imaging technology. Too long ppt will distract the audience, and it will also lead to insufficient time, making it difficult to grasp the main points. Too few pages will make the explanation difficult to express clearly and explain the comprehensive content in a limited time. The content of 8 pages can better clarify the logic of the paper and grasp the core of the paper. Medical imaging technology is to show the normal and abnormal morphology, structure and some physiological functions of human internal tissues and organs by means of the interaction between a certain medium and the human body.